How severe is CVE-2025-34394?

CVE-2025-34394 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-34394 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34394?

CVE-2025-34394 affects Barracuda Rmm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-34394?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-34394 have an EU (EUVD) identifier?

Yes. CVE-2025-34394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202445.

When was CVE-2025-34394 published?

CVE-2025-34394 was published on 2025-12-10 and last updated on 2026-06-17.

CVE-2025-34394

CVE-2025-34394 is a critical-severity vulnerability in Barracuda Rmm with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 10.0
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-202445
Weakness: CWE-502
Affected product: Barracuda Rmm
Published: 2025-12-10
Last modified: 2026-06-17

Description

Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, exposes a .NET Remoting service that is insufficiently protected against deserialization of arbitrary types. This can lead to remote code execution.

Frequently asked questions

What is CVE-2025-34394?: Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, exposes a .NET Remoting service that is insufficiently protected against deserialization of arbitrary types. This can lead to remote code execution.
How severe is CVE-2025-34394?: CVE-2025-34394 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-34394 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34394?: CVE-2025-34394 affects Barracuda Rmm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-34394?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-34394 have an EU (EUVD) identifier?: Yes. CVE-2025-34394 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-202445.
When was CVE-2025-34394 published?: CVE-2025-34394 was published on 2025-12-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:barracuda:rmm:*:*:*:*:*:*:*:*

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CVE-2025-34393 — Critical (CVSS 9.8): Barracuda Service Center, as implemented in the RMM solution, in versions prior to 2025.1.1, does not correctly verify…
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